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Always use std::regex

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Since now minimum supported GCC is 4.9.
This commit is contained in:
Yuriy Skalko 2020-11-21 20:11:23 +02:00
parent b4b2d01ea7
commit f3ec89cfa1
8 changed files with 23 additions and 145 deletions
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3
3rdparty/Makefile.am vendored
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@ -3,11 +3,8 @@ include $(top_srcdir)/config/common.am
DIST_SUBDIRS = boost dtl hunspell mythes libiconv zlib
if USE_INCLUDED_BOOST
if LYX_USE_STD_REGEX
else
BOOST = boost
endif
endif
if USE_INCLUDED_HUNSPELL
HUNSPELL = hunspell

8
3rdparty/boost/libs/CMakeLists.txt vendored
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@ -6,10 +6,4 @@
project(boost)
if(LYX_USE_STD_REGEX)
message(STATUS "Using std regex")
else()
add_subdirectory(regex)
endif()
message(STATUS "Using std regex")

52
CMakeLists.txt
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@ -380,13 +380,7 @@ unset(LYX_GCC11_MODE)
if(UNIX OR MINGW)
if (CMAKE_CXX_COMPILER_ID MATCHES "^([cC]lang|AppleClang)$")
# ignore the GCC_VERSION for clang
# and use the resulting CXX11_STD_REGEX found in FindCXX11Compiler.cmake
message(STATUS "Using clang")
if(CXX11_STD_REGEX)
set(LYX_USE_STD_REGEX 1)
else()
set(LYX_USE_STD_REGEX 0)
endif()
else()
execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpfullversion OUTPUT_VARIABLE GCC_VERSION ERROR_VARIABLE _error RESULT_VARIABLE _err OUTPUT_STRIP_TRAILING_WHITESPACE)
#message(STATUS "dumpfullversion: error = ${_error}, result = ${_err}")
@ -399,7 +393,6 @@ if(UNIX OR MINGW)
if(GCC_VERSION VERSION_LESS 4.9)
message(FATAL_ERROR "gcc >= 4.9 is required.")
endif()
set(LYX_USE_STD_REGEX 1)
endif()
set(LYX_GCC11_MODE "${CXX11_FLAG}")
else()
@ -407,7 +400,6 @@ else()
# Drop support for msvc versions prior to 1900 (Visual Studio 2015)
message(FATAL_ERROR "Visual Studio >= 2015 is required.")
endif()
set(LYX_USE_STD_REGEX 1)
endif()
if(LYX_3RDPARTY_BUILD)
@ -941,40 +933,12 @@ if(NOT LYX_EXTERNAL_DTL)
add_subdirectory(3rdparty/dtl)
endif()
if(LYX_USE_STD_REGEX)
# Set only include path.
# Use internal boost, which is known to exist
# we don't need any libraries
set(Lyx_Boost_Libraries)
add_definitions(-DBOOST_USER_CONFIG=<config.h>)
include_directories(${TOP_SRC_DIR}/3rdparty/boost)
else()
# Using boost-regex
if(LYX_EXTERNAL_BOOST)
message(STATUS "Searching for external boost")
find_package(Boost COMPONENTS regex)
if(Boost_FOUND)
message(STATUS "Boost found")
message(STATUS "Boost-libs = ${Boost_LIBRARIES}")
set(Lyx_Boost_Libraries ${Boost_LIBRARIES})
if (LYX_STDLIB_DEBUG OR LYX_DEBUG_GLIBC OR LYX_DEBUG_GLIBC_PEDANTIC)
# Comment from Jean-Marc Lasgouttes:
# In general, system boost libraries are incompatible with
# the use of stdlib-debug in libstdc++. See ticket #9736 for
# details.
message(FATAL_ERROR "Compiling LyX with stdlib-debug and system boost libraries may lead to crashes. Consider using '-DLYX_STDLIB_DEBUG=OFF -DLYX_DEBUG_GLIBC=OFF -DLYX_DEBUG_GLIBC_PEDANTIC=OFF' or using '-DLYX_EXTERNAL_BOOST=OFF'")
endif()
else()
message(FATAL_ERROR "Boost not found" ${Boost_ERROR_REASON})
endif()
else()
# Using included boost
set(Lyx_Boost_Libraries boost_regex)
add_definitions(-DBOOST_USER_CONFIG=<config.h>)
include_directories(${TOP_SRC_DIR}/3rdparty/boost)
add_subdirectory(3rdparty/boost "${TOP_BINARY_DIR}/3rdparty/boost")
endif()
endif()
# Set only include path.
# Use internal boost, which is known to exist
# we don't need any libraries
set(Lyx_Boost_Libraries)
add_definitions(-DBOOST_USER_CONFIG=<config.h>)
include_directories(${TOP_SRC_DIR}/3rdparty/boost)
if(WIN32)
if(LYX_CONSOLE)
@ -1175,10 +1139,6 @@ if(QTVERSION MATCHES "^([0-9]+)\\.([0-9]+)\\.([0-9]+).*")
MATH(EXPR QT4_VERSION "(${CMAKE_MATCH_1}<<16)|(${CMAKE_MATCH_2}<<8)|${CMAKE_MATCH_3}")
endif()
if (NOT HAVE_REGEX)
set(LYX_USE_STD_REGEX 0)
endif()
set (cmd ${CMAKE_CTEST_COMMAND})
if (MSVC)

41
config/lyxinclude.m4
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@ -213,46 +213,6 @@ AC_DEFUN([LYX_CXX_CXX11_FLAGS],
])
dnl Usage: LYX_CXX_USE_REGEX
dnl decide whether we want to use std::regex and set the
dnl LYX_USE_STD_REGEX macro and conditional accordingly.
AC_DEFUN([LYX_CXX_USE_REGEX],
[AC_ARG_ENABLE(std-regex,
AS_HELP_STRING([--enable-std-regex],[use std::regex instead of boost::regex (default is autodetected)]),
[lyx_std_regex=$enableval],
[AC_MSG_CHECKING([for correct regex implementation])
save_CPPFLAGS=$CPPFLAGS
CPPFLAGS="$AM_CPPFLAGS $CPPFLAGS"
save_CXXFLAGS=$CXXFLAGS
CXXFLAGS="$AM_CXXFLAGS $CXXFLAGS"
# The following code snippet has been taken taken from example in
# http://stackoverflow.com/questions/8561850/compile-stdregex-iterator-with-gcc
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <regex>
#include <iostream>
#include <string.h>
typedef std::regex_iterator<const char *> Myiter;
]], [[
const char *pat = "axayaz";
Myiter::regex_type rx("a");
Myiter next(pat, pat + strlen(pat), rx);
Myiter end;
]])],[lyx_std_regex=yes],[lyx_std_regex=no])
CXXFLAGS=$save_CXXFLAGS
CPPFLAGS=$save_CPPFLAGS
AC_MSG_RESULT([$lyx_std_regex])
])
if test $lyx_std_regex = yes ; then
lyx_flags="$lyx_flags std-regex"
AC_DEFINE([LYX_USE_STD_REGEX], 1, [define to 1 if std::regex should be preferred to boost::regex])
fi
AM_CONDITIONAL([LYX_USE_STD_REGEX], test $lyx_std_regex = yes)
])
dnl Usage: LYX_CXX_USE_CALL_ONCE
dnl check whether we can use std::call_once and set the
dnl LYX_USE_STD_CALL_ONCE macro and conditional accordingly.
@ -319,7 +279,6 @@ LYX_PROG_CLANG
LYX_CXX_CXX11_FLAGS($enable_cxx_mode)
LYX_LIB_STDCXX
LYX_LIB_STDCXX_CXX11_ABI
LYX_CXX_USE_REGEX
LYX_CXX_USE_CALL_ONCE
AC_LANG_POP(C++)

2
development/cmake/config.h.cmake
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@ -50,8 +50,6 @@
#cmakedefine LYX_MERGE_FILES 1
#cmakedefine LYX_USE_STD_REGEX 1
// Define if callstack can be printed
#cmakedefine LYX_CALLSTACK_PRINTING 1

9
src/frontends/qt/GuiCitation.cpp
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@ -991,19 +991,10 @@ static docstring escape_special_chars(docstring const & expr)
// $& is an ECMAScript format expression that expands to all
// of the current match
#ifdef LYX_USE_STD_REGEX
// To prefix a matched expression with a single literal backslash, we
// need to escape it for the C++ compiler and use:
// FIXME: UNICODE
return from_utf8(lyx::regex_replace(to_utf8(expr), reg, string("\\$&")));
#else
// A backslash in the format string starts an escape sequence in boost.
// Thus, to prefix a matched expression with a single literal backslash,
// we need to give two backslashes to the regex engine, and escape both
// for the C++ compiler and use:
// FIXME: UNICODE
return from_utf8(lyx::regex_replace(to_utf8(expr), reg, string("\\\\$&")));
#endif
}

8
src/frontends/tests/biblio.cpp
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@ -20,17 +20,9 @@ string const escape_special_chars(string const & expr)
// $& is a ECMAScript format expression that expands to all
// of the current match
#ifdef LYX_USE_STD_REGEX
// To prefix a matched expression with a single literal backslash, we
// need to escape it for the C++ compiler and use:
return lyx::regex_replace(expr, reg, "\\$&");
#else
// A backslash in the format string starts an escape sequence in boost.
// Thus, to prefix a matched expression with a single literal backslash,
// we need to give two backslashes to the regex engine, and escape both
// for the C++ compiler and use:
return lyx::regex_replace(expr, reg, "\\\\$&");
#endif
}

45
src/support/regex.h
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@ -12,45 +12,32 @@
#ifndef LYX_REGEXP_H
#define LYX_REGEXP_H
#ifdef LYX_USE_STD_REGEX
# include <regex>
// <regex> in gcc is unusable in versions less than 4.9.0
// see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53631
# define LR_NS std
#else
# include <boost/regex.hpp>
# define LR_NS boost
#endif
#include <regex>
namespace lyx {
using LR_NS::regex;
using LR_NS::regex_match;
using LR_NS::regex_replace;
using LR_NS::regex_search;
using LR_NS::sregex_iterator;
using LR_NS::smatch;
using LR_NS::basic_regex;
using LR_NS::regex_error;
using LR_NS::match_results;
using std::regex;
using std::regex_match;
using std::regex_replace;
using std::regex_search;
using std::sregex_iterator;
using std::smatch;
using std::basic_regex;
using std::regex_error;
using std::match_results;
namespace regex_constants
{
using namespace LR_NS::regex_constants;
using LR_NS::regex_constants::match_flag_type;
using namespace std::regex_constants;
using std::regex_constants::match_flag_type;
} // namespace regex_constants
} // namespace lyx
#undef LR_NS
#ifdef LYX_USE_STD_REGEX
// Match Begin and End of String when using ECMAScript (default std::regex)
#define REGEX_BOS "^"
#define REGEX_EOS "$"
#else
// Match Begin and End of String when using Perl RE (default boost::regex)
#define REGEX_BOS "\\`"
#define REGEX_EOS "\\'"
#endif
#endif
#endif // LYX_REGEXP_H